Digital guide
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Woodward 8915-429
- Product Name: Woodward 8915-429 – 505 Series Digital Governor / Overspeed Protector (3151 Valve with TM40 LP Actuator)
- Product Introduction: The 8915-429 is a microprocessor-based digital governor controller produced by Woodward, belonging to the classic 505 series, primarily designed for speed control and overspeed protection of steam turbines. The part number is also associated with a 3151 valve assembly with TM40 LP (Low Pressure) actuator.
Detailed content
- Technical Specifications:
- Power Supply: 18–32 Vdc (24 Vdc nominal)
- Display: Two-line × 24-character LED display
- Enclosure Rating: NEMA 4X or IEC 60529 IP56
- Inputs: 6 programmable current inputs, 16 discrete contact inputs
- Outputs: 2 actuator outputs, 8 relay outputs, 6 programmable current outputs
- Communication Interfaces: RS-232, RS-422, RS-485
- Software: OpView™ and 505View
- Operating Temperature: –20 to +60°C (–4 to +140°F)
- Storage Temperature: –40 to +85°C
- Weight: Approximately 9.11 lbs (4.13 kg)
- Associated Valve: 3151 valve with TM40 LP actuator
- Functional Features:
- Precise steam turbine speed control
- Triple independent overspeed protection logic
- Emergency shutdown capability
- Automatic control mode switching on sensor failure
- Local/remote control priority selection
- Application Scenarios: Steam turbine control, small grid turbo-generators, turboexpanders, single extraction/admission applications.
- Material Composition: Printed circuit boards in NEMA 4X/IP56 industrial enclosure; valve assembly with TM40 LP actuator.
- Structural Characteristics: 505-series microprocessor controller; valve assembly configuration with 3151 valve and TM40 LP actuator for low-pressure applications.
- Working Principle: Adjusts steam inlet flow via actuator outputs to control turbine speed; triple independent overspeed protection ensures rapid shutdown on overspeed detection.
- Installation Requirements: Control panel mounting; 24 Vdc power supply; proper connection to TM40 LP actuator and 3151 valve.
- Usage Notes: Configure via OpView™/505View. Regular overspeed testing. Maintain within specified temperature and humidity ranges.
